Defected Ground Structure for Microstrip Antennas

Guha, Debatosh; Biswas, Subhendu; Antar, Yahia M. M.

doi:10.1002/9780470973370.ch12

Cited by 67 publications

(64 citation statements)

References 59 publications

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“…Professors Jim James and Peter Hall have created a large body of work on this topic [1][2][3][4][5][6][7][8][9]. This work has since been extended by other authors [10][11][12][13]. The size of the patch antenna cab be reduced by using shorting pins; shorting walls; slots; ceramic materials; fractals and folded patches and ground planes [14][15][16][17][18].…”

mentioning

confidence: 99%

Microstrip patch antennas with 3-dimensional substrates

Whittow

2012

2012 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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confidence: 99%

Microstrip patch antennas with 3-dimensional substrates

Whittow

2012

2012 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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“…The fundamental resonating modes of the developed suspended antenna may be calculated from [27]. The excitation due to TM mn modes depends on the balanced point of the probe feed.…”

Section: Analysis Of Experimental and Measured Resultsmentioning

confidence: 99%

Analysis of Multi-Resonance Characteristics in Suspended Ring Antenna Applicable for Iot/WSN

Mohapatra¹,

Barad²,

Behera³

2017

PIER M

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Abstract-In this work, the multi-resonance behavior of a suspended ring antenna structure with a single port has been investigated. Introduction of symmetrical slots at each arm of the ring structure enables quad-band operation. The antenna yields good impedance matching at 3.4 GHz, 4.5 GHz, 5.8 GHz and 7.5 GHz with considerably high gain response up to 6 dBi. Maintaining suitable air height from the ground plane enhances the bandwidth up to 12%. This compact antenna shows bandwidths of 130 MHz, 360 MHz, 850 MHz, and 380 MHz, respectively. Each resonance claims an efficient use in next generation wireless communication within S-band and C-band radio links extensively and also applicable in WSNs/IoTs which requires a multi-functional antenna system. Theoretical analysis of the proposed antenna is investigated with the equivalent lumped circuit. The antenna element is excited using separate feed patch alongside of the ring. The antenna exhibits TM 10 , TM 01 , TM 11 excitation modes at different resonances. The said antenna is implemented on an FR4 substrate with dielectric constant of 4.4, substrate thickness of h = 1.56 mm and loss tangent of tan δ = 0.02. The antenna is designed with physical dimensions of 18 × 18 × 7.56 mm 3 which claims its compactness.

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“…DGS have found numerous applications in the design of microwave circuits, such as antennas, couplers, amplifiers, and filters [13][14][15]. DGS shapes inserted in the ground plane of the transmission lines add the equivalent capacitive and inductive elements to transmission lines, which modify the characteristic impedance and effective dielectric constant, and slow-wave effect produced [16]. The additional lumped inductance added because of DGS plays major role to reduce the phase velocity of the wave, which leads to generation of the slow wave effect.…”

Section: Introductionmentioning

confidence: 99%

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Bhakhar¹,

Dwivedi²,

Prajapati³

2017

Proceedings of the International Conference on Communication and Signal Processing 2016 (ICCASP 2016)

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Abstract. This research paper investigates about the novel approach in the design and analysis of Couplers operating at 5 GHz, which finds its application for next generation communication systems. The concept of Defected Ground Structure (DGS) in the design of planar coupler is useful for next generation communication systems. The Planar Coupler with an embedded DGS structure is designed for an operating frequency 5 GHz. A convention allow profile planar coupler with an embedded a head dumbbell shaped DGS structure operating at 5 GHz was designed independently and integrated embedded with resonating DGS. The analysis is carried out by varying the dimensions of the DGS. Various electrical performance parameters like transmission coefficient, return loss, coupling factor and isolation have been analytically observed and reproduced for aspirant researchers and designers. The integration of this electromagnetically coupled DGS resulted into significant volumetric reduction of the directional coupler. Incorporating one circular head dumbbell shape reduces the size of ground plane up to 31% while we achieved reduction of 12% in strip-length in comparison to the equivalent conventional coupler. In addition, we found an increase of 127.27% in its directivity compared to conventional counterpart. The effects of variations of DGS dimensions on scattering parameters of this coupler have shown appreciable enhancement. This coupler helps as an inspiration, encouragement and motivation for saving the materials used in designing it, reduces the electrical and RF losses converted into heat and thus a journey towards go-green-earth!

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Defected Ground Structure for Microstrip Antennas

Cited by 67 publications

References 59 publications

Microstrip patch antennas with 3-dimensional substrates

Microstrip patch antennas with 3-dimensional substrates

Analysis of Multi-Resonance Characteristics in Suspended Ring Antenna Applicable for Iot/WSN

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

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